An interesting experimental composition

-Germination of mung bean seeds

In today's science class, the teacher asked us to do a small experiment at home, that is, do you need sunshine to see mung bean sprouts? Do seeds need water for germination? So, as soon as I got home from school, I finished my homework and prepared to start the experiment. I first found two complete plates, two toilet paper of the same size, six mung bean seeds and some water. When I was ready, I began to do the experiment. I first put two pieces of toilet paper in two plates. Then divide these six mung bean seeds into two parts, put them on toilet paper, one on the balcony, the other tied with a bowl, label the vegetables on the balcony as the experimental group, label the vegetables tied with a bowl as the control group, and then give them the same conditions, except for the sunshine. Then do another experiment. This experiment is the same as the one just now, with only one difference, that is-

After four days, I went to see the results of mung beans, and found that the results of the first experiment were: all sprouted, but the mung bean sprouts with sunshine grew taller and stronger than those without sunshine, while the results of the other group were: the mung bean sprouts with water germinated, but the mung bean sprouts without water did not change.

Later, in the science class, the teacher explained this truth to us: whether the mung bean seeds germinate with light or without light, it is because the cotyledons can provide nutrition for the new buds in the seed coat before germination. But why do mung bean sprouts with sunshine grow better than those without sunshine? Because the cotyledons can't provide nutrition for the new buds after the seeds germinate, the new buds can only grow by themselves through the photosynthesis of sunlight.

After this experiment, I summed up an experience, that is: seeds do not need sunshine for germination, but seeds must have sunshine for growth.

After mung bean seeds germinate, I plant mung bean sprouts in flowerpots and water them every day. As the days passed, the mung bean sprouts grew bigger and bigger, the leaves grew greener and grew stronger day by day.

After this experiment, I summed up an experience, that is: do not jump to conclusions, be practical.

Only after verification, evidence and evidence can we get the real result.

Remember an interesting little experiment?

I have been curious since I was a child, especially about flying. I want to glide in the sky most, so I like flying very much.

It was noon, and I was fiddling with the golden cloth in front of me. Playing, it suddenly occurred to me: why not use this cloth for parachute experiment? Do it. I immediately found four ropes of the same length and tied them to the four corners of the cloth. After I tied them, I tried to pull four strings to make sure there was no problem, so I found a small toy and tied all four strings to the toy. Excited, I climbed into a higher cabinet, stood up, grabbed my parachute and paratroopers, waved my hand, and I thought this parachute would definitely fall down, but something unexpected happened. The paratroopers actually sagged straight, and finally failed to land safely and died heroically. I paused: how could it be that the experiment was wrong and I jumped out of the cupboard without thinking, grabbed the paratroopers, looked around, and there was nothing wrong? I finally came to the conclusion that toys are too heavy. So, I immediately changed to a lighter toy, tied a rope to it, and did another experiment. As a result, the paratroopers ended tragically. I wonder if there are any more questions. At this moment, a breeze blew, and I had an idea: there must be insufficient wind. So I took the paratroopers to the top floor again. It's just a gust of wind, but it's too late. As soon as the parachute opened, the paratroopers landed leisurely on the ground and landed safely. I cheered, rushed downstairs, picked up the paratroopers and shouted excitedly, "I made it!" Success! "

Although this is only a small experiment done a long time ago, it is deeply imprinted in my mind. Whenever I encounter difficulties, the parachute and paratroopers always appear in front of my eyes, prompting me to overcome all kinds of difficulties. In life, difficulties are like spring. You are strong, he is weak. If you are weak, he is strong. Therefore, as long as you can't bow your head in the face of difficulties, no matter how strong the difficulties are, you will only be defeated!

Remember an interesting little experiment?

This Sunday afternoon, I was bored and could only sit in a chair in a daze. My father seemed to read my mind and said, "How about an experiment with you?" I jumped with excitement. "What are you waiting for?"

So, my father pulled me into the kitchen, turned on the tap and said to me, "Look at this water. It keeps flowing downwards. Can you make it turn? " I don't think it's possible to make it turn. My father can't. I said, "No. Is that okay? " Father smiled and said, "Look!" He took a spoon and rubbed it with woolen cloth several times to make it charged. Dad put it near the thin water, ah! The water turned around and approached the spoon. What's going on here? Does dad have magic? Dad saw my doubts and said, "Tell you the truth: the spoon attracts uncharged water. Once the spoon touches the water, this little experiment will not succeed. Water is a conductor, so it can immediately conduct electricity out of the spoon! Even water vapor floating in the air can be charged. Do you understand? " I nodded in confusion. "Give it a try!" He gave me a spoon. I did just like my father did, yeah! The current really turned! I became a magician, too.

This experiment is really interesting!

Remember an interesting little experiment?

I am a little boy who loves to explore new things. I heard that after cutting an earthworm into two parts, it will not only die, but also become two live earthworms! To prove this, I did an interesting little experiment.

The students said that earthworms could be seen everywhere after the rain. One day after taking a bath, I really found an earthworm beside the flower bed without any effort.

When I got home on Friday, I took out my art knife, put the earthworm on a piece of paper and thought confidently: I will definitely complete the experiment successfully.

The experiment began, and I carefully cut the earthworm in half. I take a closer look, why does the earthworm seem to be dead and motionless? I was extremely depressed: did my experiment fail? Just when I was depressed, I suddenly remembered what my mother had said to me: "Don't give up when you encounter difficulties, my mother believes you can do it!" " So I pulled myself together and continued to do the experiment. I took "100,000 Why Biology Articles" and began to look for some information about earthworms. I rummaged through it and found the answer. Oh! It turns out that after the earthworm is cut off, the muscles next to the wound will tighten immediately, just like the door that was still open will close immediately. It's amazing! Earthworms are actually very regenerative, so that's it! After two or three days, the divided earthworm can become two complete earthworms! Seeing this, I seem to see the dawn of victory and have confidence again!

Two days later, when I went to see my earthworms again, I really found two small earthworms crawling around in the box! I told my mother about it, and she smiled and said, "Haha, our son will learn to do experiments by himself!" "

This is a little experiment I have done before. Isn't it interesting?

Remember an interesting little experiment?

One day, I was reading a book when my mother came with a flowerpot. I asked, "What are you doing with a flowerpot?" "Do you want to know the flowerpot refrigerator?" My mother said mysteriously. "Can flowerpots be used as refrigerators?" I'm confused. "If you want to know, just do it with me."

I prepared experimental materials according to my mother's list: clay flowerpot, a can of coke, tap water and a glass plate. I shouted to my mother, "It's time to do the experiment." My mother smiled and said, "Don't worry, step by step." First, put the coke in the middle of the plate, and then pour some water into the plate. Then, cover the earthen flowerpot with cola, and then pour some water on the earthen flowerpot; Finally, my mother asked me to put the "flowerpot refrigerator" in the sun for an hour. I am surprised and curious about sunbathing. "That's right," my mother replied. I'm a little confused. "I really don't know what my mother is doing."

An hour later, my mother took me to the yard, opened the flowerpot and said, "Please drink iced coke!" " I stretched out my hand and touched it. It was a little cold. I couldn't wait to take a sip: "Great! The flowerpot refrigerator is really amazing. What is the principle of being so cold after so long sun exposure? " Mother explained, "When water becomes steam, it needs to absorb heat. Put the flowerpot soaked in water in the sun. When the water outside the flowerpot evaporates, it absorbs the heat in the flowerpot and reduces the temperature in the flowerpot, so it cools the coke inside. " "If you make an oversized flowerpot and put me in it, it will definitely feel great," I asked.

An Interesting Experiment Shu Wenxi, Class 5 (3), Gao Qi Primary School, Daguan District, Anqing City, Anhui Province Instructor: Instructor: Jiang Peng On this day, Teacher Wen Jiang asked us to do an experiment about the sun. Teacher Wen Jiang asked us to do an experiment about the sun. I get excited when I listen to doing experiments. But what experiment do I do about the sun? I am excited about this experiment. But what experiment do I do about the sun? I came up with a good idea. Listen to me and you will know. I came up with a good idea. Listen to me and you will know. At noon, I can't wait to do this experiment, because the sunshine is strongest at noon. At noon, I can't wait to do this experiment, because the sunshine is strongest at noon, and the effect will be good. I will look at the sun with my eyes first, and the effect will be good. I look at the sun with my eyes first, then I look at the sun with my hands over my eyes, and then I look at the wall. Then look at the wall. I slowly moved my eyes to the sun for fear of damaging them. My eyes are too far away. I slowly moved my eyes to the sun for fear of damaging my eyes. The sun is getting closer and closer. At the moment I saw the sun, the sword flew towards me, getting closer and closer to the sun. At the moment I saw the sun, A Jin sword flew at me and stung my eyes. After a rest, I covered my eyes with my hand and looked at the sun, which stung my eyes. After a rest, I covered my eyes with my hands and looked at the sun. After two or three minutes, I turned my eyes to the wall. ? How did the white wall become? I turned my eyes to the wall. What about the red and blue flower wall? Besides, my eyes are hurt by the sun. What about the red and blue flower wall? Besides, my eyes are hurt by the sun. I don't believe that our sun is1.500 million kilometers, and neither do I. Why is the sun still so strong? So strong? Must be the first time I'm not used to it. Must be the first time I'm not used to it. So, so, under the torture of curiosity, I did this experiment again. This experiment was done. Cover your eyes with your hands and look at the sun. After three minutes, cover your eyes with your hands and watch the sun again. Three minutes passed, and then the white wall became a flower wall. Now I believe it. It became a flower wall, and now I believe it. The sun not only gives us a bright and warm world, but also has many special functions. The sun not only gives us a bright and warm world, but also waits for us to explore and explore. Wait for us to explore, to explore. Teacher's comment: The process of the experiment was recorded in an orderly way and also described in detail. Teacher's comment: The process of the experiment was recorded in an orderly way and also described in detail.

An interesting experiment: Guo Jie, Class One, Grade Five. This semester, we learned a lot of interesting experiments. Experiments can not only use hands, but also use brains to activate brain thinking. I think the most interesting experiment is the verification of volcanic eruption. That day, I came home and couldn't wait to start the experiment. I first prepared experimental materials such as mashed potatoes, ketchup, matches, alcohol lamps, iron boxes and iron shelves. I saw that I first put some mashed potatoes in the iron box, kneaded them into the shape of a mountain, dug a small hole made of mashed potatoes at the top of the mountain, poured some ketchup into the hole, and then sealed the "mountain pass" with a thin layer of mashed potatoes. Finish all this. I put the iron box on the iron shelf and heated it with alcohol lamp. I waited carefully for the results of the experiment, and watched attentively, never letting go of any detail. After about three or four minutes, the tomato sauce poured into the crater began to bubble and began to overflow bit by bit. My heart beat faster, I held my breath and waited for the last moment. Finally, under the action of high temperature, the "magma" of the "crater" keeps pouring out, just like the real magma rolling out. "It worked! It worked! My experiment succeeded! " I danced with ecstasy. Make a hullabaloo about, as if winning the lottery. Through this experiment, I came to the conclusion that volcanic eruption: the deeper the crust, the higher the temperature and the greater the pressure, and the magma moves upward through cracks or cracks in rocks like burning glass. In the process of magma rising, when it meets the weak crust, it will eject from the surface and form a volcano. This is really an interesting experiment, which not only taught me wonderful scientific knowledge, but also exercised my practical ability.